On 28/04/2022 12:05, Marek Szyprowski wrote: >>>>> I also don't see any code that would read those properties. IMHO they >>>>> should be simply removed at all, at least for the PL330 related nodes. >>>> In current Linux implementation they indeed are not used. Nothing parses >>>> them. However: >>>> 1. They describe (hopefully correct) the hardware. >>>> 2. They might be used by other implementations of pl330 driver. >>>> >>>> I would not remove them from existing sources, but indeed maybe there is >>>> no need to add for new files. >>> What's the point in having dt properties duplicating data that might be >>> read from the driver registers? >> Hm, indeed, there is no point in this. Since they are read from >> registers, what was the idea behind in commit 42cf20980cde? > > #dma-cells is indeed required, but the rest seems to be the cargo-cult > of some kind. Rob, Any guidance from your side? Is there any benefit in describing the hadrware (dma-channels/dma-requests) if the same value can be read from registers? Best regards, Krzysztof
